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<H2>not1()</H2>
<P><B>Module:</B>&nbsp;&nbsp;Standard C++ Library&nbsp;&nbsp;&nbsp;<B>Library:</B>&nbsp;&nbsp;<A HREF="2-4.html">General utilities</A></P>

<PRE><HR><B><I>Function</I></B><HR></PRE>

<UL>
<LI><A HREF="#sec1">Local Index</A></LI>
<LI><A HREF="#sec2">Summary</A></LI>
<LI><A HREF="#sec3">Synopsis</A></LI>
<LI><A HREF="#sec4">Description</A></LI>
<LI><A HREF="#sec5">See Also</A></LI>
<LI><A HREF="#sec6">Standards Conformance</A></LI>
</UL>
<A NAME="sec1"><H3>Local Index</H3></A>
No Entries
<A NAME="sec2"><H3>Summary</H3></A>
<P>A function adaptor used to reverse the sense of a unary predicate function object</P>
<A NAME="sec3"><H3>Synopsis</H3></A>

<PRE>#include &lt;functional&gt;

namespace std {
  template&lt;class Predicate&gt;
  unary_negate &lt;Predicate&gt; not1(const Predicate&amp;);
}
</PRE>
<A NAME="sec4"><H3>Description</H3></A>
<P><SAMP>not1()</SAMP> is a function adaptor, known as a negator, that takes a unary predicate function object as its argument and returns a unary predicate function object that is the complement of the original. <B><I><A HREF="unary-negate.html">unary_negate</A></I></B> is the function object class used for a return type for the <SAMP>not1()</SAMP> negator. </P>
<P>Note that <SAMP>not1()</SAMP> works only with function objects that are defined as subclasses of the class <B><I><A HREF="unary-function.html">unary_function</A></I></B>.</P>
<A NAME="sec5"><H3>See Also</H3></A>
<P><A HREF="negators.html">Negators</A>, <SAMP><A HREF="not2.html">not2()</A></SAMP>, <B><I><A HREF="unary-function.html">unary_function</A></I></B>, <B><I><A HREF="unary-negate.html">unary_negate</A></I></B>, <B><I><A HREF="pointer-to-unary-function.html">pointer_to_unary_function</A></I></B></P>
<A NAME="sec6"><H3>Standards Conformance</H3></A>
<P><I>ISO/IEC 14882:1998 -- International Standard for Information Systems -- Programming Language C++, Section 20.3.5</I></P>

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